Malicious PDF — malware analysis report

Static analysis result for SHA-256 6519f3088bc1964f…

MALICIOUS

PDF

42.7 KB Created: 2021-05-20 02:42:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a94e72595d93b456b025dbad143acb01 SHA-1: 1c257cbec24946fd24dfcd3d75977bad499ac2f1 SHA-256: 6519f3088bc1964f326cf7fa6b9bc2444e6168163c9bc219ac53bd0f173e6556
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "Coin Master Hack Apk" and embeds multiple links. One of these links, https://netcdn.xyz/app/406889139/coin-master-hack-apk-latest-version-2021-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering attempt to trick users into visiting malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-hack-apk-latest-version-2021-game-hack In PDF document text
    • http://elearnfactory.com/images/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/link-coin-master_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-scam_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://elearnfactory.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3F 24624 bytes
SHA-256: 1f04fda62c28c0d805a9e8177e54e7d176190e8b654a9824c028822514ad28a6
font_01_sfnt_off000083c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C5 18428 bytes
SHA-256: 3ea7a61419cbe52eb029f29c9b150dae48cf78ebe9ef7deec7bc9e8a272032f3

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